How to know if my label printer is malfunctioning?

If you cannot print in good condition, please print a self-test label to confirm if the p1rinter got broken.

Turn on the label printer;
Press FEED button and hold on;
Release your finger when you hear two ‘Di’ sounds;
It will print out a self-test label.

If the self-test label can be printed well, it means the printer is fine. The problem should be setting issue.

Your cart is currently empty

/* if no javascript: get back ATC button */ body:not(.spo-loaded) [data-shopify="payment-button"], body:not(.spo-loaded).template-product form[action="/cart/add"] [type=submit], body:not(.spo-loaded).template-collection form[action="/cart/add"] [type=submit], body:not(.spo-loaded).template-index form[action="/cart/add"] [type=submit], body:not(.spo-loaded) form[action="/cart/add"] [type=submit] {opacity: 1; pointer-events: all} body:not(.spo-loaded) form[action^="/cart"]:not([action^="/cart/add"]):not(#currency_form) button, body:not(.spo-loaded) form[action^="/cart"]:not([action^="/cart/add"]):not(#currency_form) input[type="submit"], body:not(.spo-loaded) form[action^="/cart"]:not([action^="/cart/add"]):not(#currency_form) input[type="button"], body:not(.spo-loaded) [name="checkout"], body:not(.spo-loaded) [name="goto_pp"], body:not(.spo-loaded) [name="goto_amazon_payments"] {opacity: 1; pointer-events: all}

THERMAL PRINTER

MONEY COUNTER MACHINE

SCANNER

GEARS

How to know if my label printer is malfunctioning?